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/*
* Copyright (c) 2002-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Nathan Binkert
* Steve Reinhardt
*/
#include <algorithm>
#include <map>
#include <string>
#include <utility>
#include "base/debug.hh"
#include "base/trace.hh"
#include "config/full_system.hh"
#include "cpu/base.hh"
#include "cpu/thread_context.hh"
#include "cpu/pc_event.hh"
#include "sim/core.hh"
#include "sim/system.hh"
using namespace std;
PCEventQueue::PCEventQueue()
{}
PCEventQueue::~PCEventQueue()
{}
bool
PCEventQueue::remove(PCEvent *event)
{
int removed = 0;
range_t range = equal_range(event);
for (iterator i = range.first; i != range.second; ++i) {
if (*i == event) {
DPRINTF(PCEvent, "PC based event removed at %#x: %s\n",
event->pc(), event->descr());
pc_map.erase(i);
++removed;
}
}
return removed > 0;
}
bool
PCEventQueue::schedule(PCEvent *event)
{
pc_map.push_back(event);
sort(pc_map.begin(), pc_map.end(), MapCompare());
DPRINTF(PCEvent, "PC based event scheduled for %#x: %s\n",
event->pc(), event->descr());
return true;
}
bool
PCEventQueue::doService(ThreadContext *tc)
{
Addr pc = tc->readPC() & ~0x3;
int serviced = 0;
range_t range = equal_range(pc);
for (iterator i = range.first; i != range.second; ++i) {
// Make sure that the pc wasn't changed as the side effect of
// another event. This for example, prevents two invocations
// of the SkipFuncEvent. Maybe we should have separate PC
// event queues for each processor?
if (pc != (tc->readPC() & ~0x3))
continue;
DPRINTF(PCEvent, "PC based event serviced at %#x: %s\n",
(*i)->pc(), (*i)->descr());
(*i)->process(tc);
++serviced;
}
return serviced > 0;
}
void
PCEventQueue::dump() const
{
const_iterator i = pc_map.begin();
const_iterator e = pc_map.end();
for (; i != e; ++i)
cprintf("%d: event at %#x: %s\n", curTick, (*i)->pc(),
(*i)->descr());
}
PCEventQueue::range_t
PCEventQueue::equal_range(Addr pc)
{
return std::equal_range(pc_map.begin(), pc_map.end(), pc, MapCompare());
}
BreakPCEvent::BreakPCEvent(PCEventQueue *q, const std::string &desc, Addr addr,
bool del)
: PCEvent(q, desc, addr), remove(del)
{
}
void
BreakPCEvent::process(ThreadContext *tc)
{
StringWrap name(tc->getCpuPtr()->name() + ".break_event");
DPRINTFN("break event %s triggered\n", descr());
debug_break();
if (remove)
delete this;
}
#if FULL_SYSTEM
void
sched_break_pc_sys(System *sys, Addr addr)
{
new BreakPCEvent(&sys->pcEventQueue, "debug break", addr, true);
}
void
sched_break_pc(Addr addr)
{
for (vector<System *>::iterator sysi = System::systemList.begin();
sysi != System::systemList.end(); ++sysi) {
sched_break_pc_sys(*sysi, addr);
}
}
#endif
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